KR101033229B1 - Tunnel support lattice girder - Google Patents

Abstract

PURPOSE: A tunnel support lattice girder is provided to enable mass production by simplifying the shape of a reinforcing bar coupler for supporting an upper reinforcing bar and a pair of lower reinforcing bars. CONSTITUTION: A tunnel support lattice girder(10) comprises a pair of lower reinforcing bars(22), an upper reinforcing bar(24), reinforcing bar couplers, and reinforcing couplers(40). The lower reinforcing bars are parallelly extended to form an arched curve. The upper reinforcing bar is located between the lower reinforcing bars and is installed in an arched shape. The reinforcing bar couplers are installed to be separated from each other and connect the lower reinforcing bars and the upper reinforcing bar. The reinforcing couplers are welded between the lower and upper reinforcing bars.

Description

Reinforced grid support for tunnel support {Tunnel support Lattice Girder}

The present invention The present invention relates to a reinforcing grid support for tunnel support, and more particularly, by simply forming a shape of a rebar coupler for fixing reinforcing bars, thereby improving the connection structure between upper and lower reinforcing bars and reinforcing bar connections formed by deformed bars, while reducing costs. The present invention relates to a steel grid support for tunnel support to improve work efficiency.

In general, the tunnel drilling work is to install the grid support at the same time as the tunnel to prevent the sinking of the ground and falling of the rock.

The lattice girders (lattice girder) is installed in the new Austrian turnnelling method (NATM) method with the installation of the arch-shaped support ball during the tunnel construction along with the pour construction of rock bolt wire mesh, shockcrete and the like.

Here, the NATM method expects the effect of visible artificial supports such as lock bolts and shockcrete, and at the same time, utilizes the strength of the rock itself, that is, the load bearing capacity, to pursue an optimal economy and high quality tunnel. It is a construction method.

The grid support is a kind of steel support, which effectively supports the pressure generated around the tunnel, and is manufactured by tying steel rods in a triangular form so that shovel casting is easy and the cavity generated on the back of the support is minimized to make it more stable. It is a stronghold that makes tunnel structure.

To further explain this, the conventional lattice girders are connected between a plurality of lower reinforcing bars having a diameter smaller than that of the upper reinforcing bars and a pair of lower reinforcing bars having a smaller diameter than the upper reinforcing bars. The members are constructed by welding each while maintaining a constant distance in the longitudinal direction.

Here, the spider is bent the end of the lattice (lattice) wire, steel wire, etc. in the form of a triangular truss in the longitudinal direction, that is, three-dimensional closed polygons and welded at both ends.

However, the conventional grid girders, as well as the complicated shape of the spider connecting the upper reinforcement and the lower reinforcement, there was a problem that requires a lot of time and cost in manufacturing it.

In addition, the conventional grid girders are connected to the upper reinforcing bar and the lower reinforcing spider is welded coupled, so that the deformation and strength of the shape due to heat is reduced, as well as the cross section of the upper reinforcing bar, lower reinforcing, spider is formed in a circular connection There was a problem that a lot of time and considerable work skills were required to combine the parts.

The present invention has been made to solve the above problems, it is an object of the present invention to reduce the cost with mass production by simply forming the shape of the reinforcing bar coupling supporting the upper reinforcing bar and the pair of lower reinforcing bars

In addition, the purpose of forming a coupling structure of the upper reinforcing bar and the lower reinforcing bar and the reinforcing bar coupling structure to solve the problems caused by the conventional welding coupling.

In addition, the purpose of the reinforcing connector is provided at intervals in the reinforcing bar coupling to withstand the external load and impact with the reinforcing bar coupling.

In order to achieve the above object, a pair of lower reinforcing rods extending in parallel to form an arcuate curve, and the upper reinforcement is disposed between the lower reinforcement and the lower reinforcement, the upper reinforcement at an interval apart from the upper, In the tunnel support reinforcing grid grating consisting of a reinforcing bar splice which is installed at intervals while connecting a pair of lower reinforcing bar and the upper reinforcing bar, the lower reinforcing bar and the upper reinforcing bar is formed of a deformed reinforcing bar, the reinforcing bar is a lower reinforcing bar and the upper The lower rebar mounting portion in which the insertion portion into which the lower reinforcement is inserted is symmetrically formed in the position corresponding to the reinforcing bar and the upper rebar mounting portion in which the insertion portion in which the upper reinforcement is inserted are formed are respectively formed, and between the lower reinforcing rod mounting portion and the upper reinforcing rod mounting portion. The outer surface is formed toward the inside while being formed wider than the width of the rebar mounting portion The mounting connection is formed to be formed integrally, the rebar mounting portion is formed in the receiving space is fixed to the reinforcing bar is fitted through the insertion portion, the end of the rebar mounting portion so that it can be easily inserted into the receiving space It is characterized in that it is composed of an elastic portion that is formed on the inner surface and the inner surface of the mounting connection portion located on the same line and the elastic portion for supporting the reinforcing bar accommodated in the receiving space.

According to the present invention, by simply forming the shape of the rebar coupler for supporting the upper reinforcing bar and the pair of lower reinforcing bar, there is an effect that can reduce the cost with mass production.

In addition, the coupling of the upper reinforcing bar and the lower reinforcing bar and the reinforcing bar coupling structure to form a coupling structure, while solving the problems caused by the existing welding coupling has an easy effect.

In addition, the reinforcing connector is installed at intervals in the reinforcing bar coupling to withstand the external load and impact as well as the reinforcing bar coupling, there is an effect that can distribute the load and impact.

1 and 2 are a front view and a perspective view showing a state of use of the reinforcement grid support for tunnels according to the present invention.
Figure 3a and 3b is a front view showing a first embodiment of the reinforcing bar coupling constituting the reinforcing steel grid support for the tunnel according to the present invention.
Figure 4a and 4b is a front view showing a second embodiment of the reinforcing bar coupling constituting the reinforcing steel grid support for the tunnel according to the present invention.
5a and 5b is a front view showing a third embodiment of the reinforcing bar coupling constituting the reinforcing steel grid support for the tunnel according to the present invention.
Figure 6 is a front view showing a reinforcing coupler constituting the reinforcing grid support for tunnels according to the present invention.
Figure 7 is a perspective view showing a coupling structure of the joint reinforcing bars constituting the reinforcing steel grid support for tunnel according to the present invention.

1 and 2 are a front view and a perspective view showing a state of use of the tunnel support reinforced grid support according to the present invention with reference to the accompanying drawings. Figure 3a and 3b is a front view showing a first embodiment of the reinforcing bar coupling constituting the reinforcing steel grid support for tunnel according to the present invention, Figures 4a and 4b is a reinforcing bar constituting the reinforcing steel grid support for tunnel support according to the present invention 5 is a front view showing a second embodiment of the sphere, Figures 5a and 5b is a front view showing a third embodiment of the reinforcing bar coupling constituting the reinforcing grid support for tunnels according to the present invention, Figure 6 is a tunnel support according to the present invention Figure 7 is a front view showing a reinforcing coupler constituting the reinforcement grid support, Figure 7 is a perspective view showing a coupling structure of the reinforcing bars constituting the reinforcing grid support for the tunnel according to the present invention.

Tunnel supporting steel grid support 10 of the present invention is a pair of lower reinforcing bar 22 extending in parallel to form an arcuate curve, and located between the lower reinforcing bar 22 and the lower reinforcing bar 22, The upper reinforcing bar 24 is installed in an arch shape at intervals, the rebar coupler 30 is provided at intervals so as to connect the pair of lower reinforcing bar 22 and the upper reinforcing bar 24, and the lower reinforcing bar ( 22) and the reinforcing coupler 40 is welded at intervals between the upper reinforcing bars 24.

Here, the lower reinforcing bar 22 and the upper reinforcing bar 24 is formed of a deformed reinforcing bar in which the protrusions 28 are formed at intervals on the outer surface.

The reinforcing bar coupling 30 which is installed at intervals and connects the pair of lower reinforcing bars 22 and the upper reinforcing bars 24 has elasticity to cope with the insertion of the reinforcing bars 22 and 24 and transmission of external impact. Branch is formed by alternatively carbon steel ball, spring steel, spring stainless steel, spring carbon steel.

In addition, the reinforcing bar coupling 30 has a lower rebar mounting portion 31 and the upper rebar mounting portion 32 is formed in a position corresponding to the lower reinforcing bar 22 and the upper reinforcing bar 24, respectively, and the lower rebar mounting unit 31 and The mounting connection part 33 is integrally formed between the upper rebar mounting parts 32.

That is, the reinforcing bar coupling 30 is formed by integrally forming a pair of lower rebar mounting portion 31 and the upper rebar mounting portion 32 on the lower both sides and the upper center with respect to the mounting connection portion 33.

Here, the lower rebar mounting portion 31 has an insertion portion 34 into which the lower rebar 22 is inserted is symmetrically formed inward, and the insertion connection portion 33 is formed wider than the width of the rebar mounting portions 31 and 32. The outer surface 36 is formed to be curved toward the inside.

In addition, the rebar mounting parts 31 and 32 into which the rebars 22 and 24 are inserted and mounted are accommodated in the receiving space 310 to which the rebars 22 and 24 are fitted through the insertion part 34 and the rebar mounting part ( 31, 32 extending at the ends of the extension portion 320, the curved surface 330 or the inclined surface is formed to be easily inserted into the receiving space 310, and the inner surface and the same line of the extension portion 320 It is formed on the inner surface of the mounting connecting portion 33 is located in the elastic portion 340 for supporting the reinforcing bar 22, 24 accommodated in the receiving space 310.

To further explain this, the reinforcing bar mounting portion (31, 32) is the receiving space through the reinforcing bar (22, 24) is inserted through the insertion portion 34, the curved surface 330 or the extension portion 320 is formed in the receiving space After inserting into the 310, the reinforcing bars 22 and 24 may be fixed using the elastic parts 340 positioned above and below.

The reinforcing connector 40 mounted at intervals between the lower reinforcing bar 22 and the upper reinforcing bar 24 may be welded while receiving the reinforcing bars 22 and 24 at positions corresponding to the reinforcing bars 22 and 24. The depression 42 is formed so that the elastic holding portion 44 is formed between the lower portion.

That is, the reinforcing connector 40 accommodates the reinforcing bars 22 and 24 in the depressions 42 located at both the upper center and the lower side, and then integrates the reinforcing connector 40 and the reinforcing bars 22 and 24 by welding. It is to be configured as.

In addition, the reinforcing bar coupling holes 38 and 46 are symmetric in the same line in the mounting connector 33 and the reinforcing connector 40 so as to be connected to the neighboring tunnel support reinforcing grid girders 10 through the joint bar 50. Is formed.

That is, the reinforcing bar coupling holes 38 and 46 are tunnel supporting reinforcing bars continuously installed through the joint reinforcing bar support 10, which is continuously formed through the joint reinforcement bar 50 formed in a planar 'c' shape. The grid support 10 is to be configured integrally.

4 and 5 show another embodiment of the tunnel supporting reinforcement grid support according to the present invention. First, the tunnel support reinforcement grid support 10 shown in FIG. 4 will be described.

Tunnel supporting steel grid support 10 of the present invention is a pair of lower reinforcing bar 22 extending in parallel to form an arcuate curve, and located between the lower reinforcing bar 22 and the lower reinforcing bar 22, The upper reinforcing bar 24 is installed in an arch shape at intervals, the reinforcing bar coupling portion 30a is provided at intervals so as to connect the pair of lower reinforcing bar 22 and the upper reinforcing bar 24, and the lower reinforcing bar ( 22) and the reinforcing coupler 40 is welded at intervals between the upper reinforcing bars 24.

Here, the lower reinforcing bar 22 and the upper reinforcing bar 24 is formed of a deformed reinforcing bar in which the protrusions 28 are formed at intervals on the outer surface.

The reinforcing bar coupling portion 30a, which is connected to the pair of lower reinforcing bars 22 and the upper reinforcing bars 24 and is spaced apart from each other, provides elasticity to cope with the insertion of the reinforcing bars 22 and 24 and transmission of external impact. Branch is formed by alternatively carbon steel ball, spring steel, spring stainless steel, spring carbon steel.

In addition, the reinforcing bar coupling portion 30a has a lower rebar mounting portion 31a and an upper rebar mounting portion 32a formed at positions corresponding to the lower rebar 22 and the upper rebar 24, respectively, and the lower rebar mounting portion 31a and the lower rebar mounting portion 31a. Between the upper reinforcing bar mounting part 32a, the mounting connection part 33a provided with the space part 35a is integrally formed.

That is, the reinforcing bar coupling portion 30a is a pair of lower reinforcing rod portions 31a and upper reinforcing rod portions 32a at both lower sides and the upper center of the mounting connection portion 33a having a triangular space portion 35a. ) Is formed integrally.

Here, the lower rebar mounting portion 31a has an insertion portion 34a into which the lower rebar 22 is inserted is symmetrically formed inward, and the insertion connection portion 33a is formed to be wider than the width of the rebar mounting portions 31a and 32a. The outer surface 36a is formed to be curved toward the inside.

The rebar mounting parts 31a and 32a to which the rebars 22 and 24 are inserted and mounted are accommodated in the receiving space 310 to which the rebars 22 and 24 are fitted to be fitted through the insertion part 34a, and the rebar mounting part ( 31a and 32a extending to the ends of the extension portion 320 and the curved surface 330 or the inclined surface is formed to be easily inserted into the receiving space 310, and the inner surface and the same line of the extension portion 320 It is formed on the inner surface of the mounting connecting portion (33a) located in the elastic portion 340 for supporting the reinforcing bar 22, 24 accommodated in the receiving space 310.

To further explain this, the rebar mounting portion (31a, 32a) is the receiving space through the reinforcing bar (22, 24) inserted through the insertion portion 34a through the curved surface 330 or the extension portion 320 is formed After inserting into the 310, the reinforcing bars 22 and 24 may be fixed using the elastic parts 340 positioned above and below.

In addition, the space part 35a formed in the mounting connection part 33a may allow the mounting connection part 33a to elastically absorb while absorbing the shock transmitted through the reinforcing bars 22 and 24.

In addition, a tension portion 39 is selectively formed at one side of the inner surface of the rebar mounting portions 31a and 31b so as to adjust the tension of the rebar mounting portions 31a and 31b when the rebars 22 and 24 are inserted or received.

That is, the tension part 39 is normally compressed so that the reinforcing bars 22 and 24 can be expanded when the rebar mounting parts 31a and 31b are inserted into or mounted on the tension part 39. The ends are curved to form a smooth tensioning action.

The reinforcing connector 40 mounted at intervals between the lower reinforcing bar 22 and the upper reinforcing bar 24 may be welded while receiving the reinforcing bars 22 and 24 at positions corresponding to the reinforcing bars 22 and 24. The depression 42 is formed so that the elastic holding portion 44 is formed between the lower portion.

That is, the reinforcing connector 40 accommodates the reinforcing bars 22 and 24 in the depressions 42 located at both the upper center and the lower side, and then integrates the reinforcing connector 40 and the reinforcing bars 22 and 24 by welding. It is to be configured as.

In addition, the mounting connection portion 33a and the reinforcing connector 40 are symmetrical on the same line so that the joint reinforcing bar support 10 and the joint reinforcing bars 50 and the joint reinforcing bars 50 can be connected to each other. Is formed.

That is, the reinforcing bar coupling holes (38a, 46) is a tunnel support reinforcing bars are continuously installed through the joint support bar 50 is formed in a planar 'c' shape of the tunnel support reinforcement grid support 10 The grid support 10 is to be configured integrally.

Next, a description will be given of the tunnel supporting reinforcing bar grid 10 of FIG. 5.

Tunnel supporting steel grid support 10 of the present invention is a pair of lower reinforcing bar 22 extending in parallel to form an arcuate curve, and is installed in an arch shape while being spaced apart on the upper portion of the lower reinforcing bar 22 A pair of upper reinforcing bars 24, reinforcing bar couplings 30b which are installed at intervals to connect the lower reinforcing bars 22 and the upper reinforcing bars 24, and the lower reinforcing bars 22 and the upper reinforcing bars 24. It consists of a reinforcing coupler 40 is welded at intervals between.

Here, the lower reinforcing bar 22 and the upper reinforcing bar 24 is formed of a deformed reinforcing bar in which the protrusions 28 are formed at intervals on the outer surface.

Reinforcing bar coupling 30b is installed at intervals so as to connect the pair of lower reinforcing bar 22 and the pair of upper reinforcing bars 24, carbon steel ball, spring steel, stainless steel for spring, spring carbon steel having elasticity It is formed to be one of which is to be able to cope with the insertion and external impact of the reinforcing bars (22, 24).

In addition, the reinforcing bar coupling portion 30b has a lower rebar mounting portion 31b and an upper rebar mounting portion 32b formed at positions corresponding to the lower rebar 22 and the upper rebar 24, respectively, and the lower rebar mounting portion 31b and the lower rebar mounting portion 31b. The mounting connection part 33b provided with the space part 35b and the horizontal support piece 37b is integrally formed between the upper reinforcement mounting parts 32b.

That is, the reinforcing bar coupling 30b is a pair of lower reinforcing bars on both sides of the lower side and the upper both sides with respect to the rectangular connection portion 33b having the rectangular space portion 35b and the horizontal support piece 37b. The mounting portion 31b and the pair of upper rebar mounting portions 32b are integrally formed.

Here, the lower and upper rebar mounting portions 31b and 32b have an insertion portion 34b into which the lower rebar 22 is inserted, and are symmetrically formed in an inward direction, and the insertion connection portion 33b has a width of the rebar mounting portions 31b and 32b. The outer surface 36b is curved toward the inside while being formed wider.

The rebar mounting parts 31b and 32b into which the rebars 22 and 24 are inserted and mounted are accommodated in the receiving space 310 to which the rebars 22 and 24 are fitted through the insertion part 34b, and the rebar mounting part ( 31b and 32b, the extended portion 320 formed at the ends of the curved surface 330 or the inclined surface to be easily inserted into the receiving space 310, and the inner surface and the same line of the extension portion 320 It is formed on the inner surface of the mounting connection portion 33b located in the elastic portion 340 to support the reinforcing bar 22, 24 accommodated in the accommodation space 310.

To further explain this, the rebar mounting portion (31b, 32b) is the receiving space through the reinforcing bar (22, 24) inserted through the insertion portion 34b through the curved surface 330 or the extended portion 320 is formed in the inclined surface After inserting into the 310, the reinforcing bars 22 and 24 may be fixed using the elastic parts 340 positioned above and below.

In addition, the space part 35b formed in the mounting connection part 33b is for performing an elastic action while absorbing the shock transmitted through the reinforcing bars 22 and 24.

In addition, a tension portion 39 is selectively formed at one side of the inner surface of the rebar mounting portions 32a and 32b so as to adjust the tension of the rebar mounting portions 32a and 32b when the rebars 22 and 24 are inserted or received.

That is, the tension unit 39 is normally compressed so that the reinforcing bars 22 and 24 can be expanded when being inserted into or mounted in the rebar mounting units 32a and 32b. In this case, the tension unit 39 The ends are curved to form a smooth tensioning action.

The reinforcing connector 40 mounted at intervals between the lower reinforcing bar 22 and the upper reinforcing bar 24 may be welded while receiving the reinforcing bars 22 and 24 at positions corresponding to the reinforcing bars 22 and 24. The depression 42 is formed so that the elastic holding portion 44 is formed between the lower portion.

That is, the reinforcing connector 40 receives the reinforcing bars 22 and 24 in the recess 42 and then integrally configures the reinforcing connector 40 and the reinforcing bars 22 and 24 through welding.

In addition, the mounting connection part 33b and the reinforcing connector 40 are symmetrical in the same line so that the joint reinforcing bar support 10 and the joint reinforcing bar joints 38b and 46 can be connected through the reinforcing bar 50. Is formed.

That is, the reinforcing bar coupling holes (38b, 46) is a tunnel supporting reinforcing bars through the joint supporting steel grid support 10 is installed continuously and the joint reinforcement (50) formed in a planar '''shape The grid support 10 is to be configured integrally.

An embodiment of the tunnel support reinforcing grating support configured as described above is as follows.

First, a reinforcing bar coupling in which a pair of lower rebar mounting parts 31a and upper rebar mounting parts 32a are integrally formed at both lower and upper centers of the mounting connection part 33a having a triangular space portion 35a. The sphere 30a is prepared.

At this time, the insertion portion 34a constituting the lower rebar mounting portion 31a is symmetrically formed in the inward direction, and the insertion connection portion 33a is formed to be wider than the width of the rebar mounting portions 31a and 32a while the outer surface 36a is It is formed to be curved toward the inside.

And the rebar mounting portion (31a, 32a) is formed extending to the end of the receiving space 310 and the reinforcing bar mounting portion (31a, 32a) is fixed to the reinforcing bars (22, 24) fitted through the insertion portion 34a An extended part 320 having a curved surface 330 or an inclined surface formed therein so as to be easily inserted into the accommodation space 310, and an inner surface of the extension part 320 and an inner surface of the mounting connection part 33a positioned on the same line. It is formed in the elastic portion 340 to support the reinforcing bar (22, 24) is formed in and accommodated in the receiving space (310).

Next, reinforcing connectors having recesses 42 formed at both lower sides and the upper center of the lower recesses 42, and elastic retaining portions 44 are formed between the lower recesses 42 so as to be welded while receiving the rebars 22 and 24. Prepare 40.

In addition, the lower reinforcing bar 22 and the upper reinforcing bar 24 having a predetermined length and formed as a reinforcing bar 24 and a plurality of joint reinforcing bars 50 formed in a 'c' shape are prepared.

In the case of trying to install the reinforcement grating support 10 for the arch-like tunnel shown in Figure 1 shown in the above state as follows. At this time, the installation method of the reinforcement grid support 10 for the tunnel support reveals that it may vary depending on the environment and structure.

First, a plurality of rebar couplers 30 and reinforcing connectors 40 are prepared at intervals, and then a pair of lower reinforcing bars (31) and upper rebar mounts (32) of the lower rebar coupler (30) 22) and the upper reinforcing bar (24) is inserted and mounted respectively.

That is, the prepared reinforcing bars 22 and 24 are press-inserted into the lower reinforcing bar mounting unit 31a and the upper reinforcing bar mounting unit 32a through the insertion unit 34a, and then the reinforcing bars 22 and 24 received using the elastic unit 340. ).

The reinforcing bar 22 and 24 are fixed to the lower reinforcing bar mounting unit 31a and the upper reinforcing bar mounting unit 32a of the reinforcing bar coupling unit 30a in the same manner as described above, and then the reinforcing bar coupler to which the reinforcing bars 22 and 24 are coupled ( Install and fix 30a) in an arch shape in the tunnel.

In addition, the reinforcing connector 40 is inserted at intervals between the lower reinforcing bars 22 and the upper reinforcing bars 24, and then formed integrally with the lower reinforcing bars 22 and the upper reinforcing bars 24 by welding. The supporting reinforcing grid grating 10 is to be completed.

Next, if you want to install another tunnel support reinforcement grid support 10 at intervals with the tunnel support reinforcement grid support 10, proceed as described above, the reinforcement grid support 10 for tunnel support What is necessary is to fix it via a joint reinforcing bar support 10 and the joint reinforcing bar reinforcing bars (38a) coupled to the adjacent tunnel support.

As described above, the reinforcement grid support for tunnel support simply forms the shape of the reinforcing bar coupling supporting the upper reinforcing bar and the pair of reinforcing bars. You will get the advantages.

In addition, the rebar coupler mounted on the part connecting the reinforcing bar is easy to assemble, but the advantage that can solve the problems caused by conventional welding.

In the above description with reference to the accompanying drawings, the present invention described in the tunnel support reinforcing grid grating mainly focused on a specific shape and direction, the present invention can be variously modified and changed by those skilled in the art, such variations and modifications the present invention It should be construed as being included in the scope of the right.

10: reinforcing bar grid support for tunnel support, 22: lower reinforcing bar,
24: upper reinforcing bar, 30: reinforcing bar coupling,
31: lower rebar mounting portion, 32: upper rebar mounting portion,
33: mounting connection portion, 34: insertion portion,
36: outer surface, 40: reinforcing connector.
50: joint rebar.

Claims (7)

A pair of lower reinforcing bars 22 extending in parallel to form an arcuate curve, and upper reinforcing bars 24 arranged in an arcuate fashion with an interval between the lower reinforcing bars 22 and the lower reinforcing bars 22. In the reinforcing bar grating 10 for tunnel support consisting of a reinforcing bar coupling 30 is installed at intervals while connecting the pair of lower reinforcing bar 22 and the upper reinforcing bar 24,
The lower reinforcing bar 22 and the upper reinforcing bar 24 is formed of a deformed bar,
The rebar coupler 30 has a lower rebar mounting portion 31 in which an insertion portion 34 into which the lower rebar 22 is inserted is symmetrically formed at an inner side of the lower rebar 22 and the upper rebar 24. And an upper rebar mounting part 32 in which an insertion part 34 into which the upper rebar 24 is inserted is formed, respectively, is formed between the lower rebar mounting part 31 and the upper rebar mounting part 32. While being formed wider than the width of the 32, the mounting connection portion 33 is formed integrally with the outer surface 36 is formed to be curved toward the inside,
The rebar mounting parts 31 and 32 are formed in the receiving space 310 is fixed to the reinforcing bar (22, 24) to be fitted through the insertion portion 34, the ends of the rebar mounting parts (31, 32) An extended part 320 having a curved surface 330 or an inclined surface to be easily inserted into the accommodation space 310, and an inner surface of the extension part 320 and an inner surface of the mounting connection part 33 positioned on the same line. Reinforcing grid support for tunnel support, characterized in that it is formed in the elastic portion 340 to support the reinforcing bars (22, 24) accommodated in the receiving space 310.
A pair of lower reinforcing bars 22 extending in parallel to form an arcuate curve, and upper reinforcing bars 24 arranged in an arcuate fashion with an interval between the lower reinforcing bars 22 and the lower reinforcing bars 22. In the reinforcing bar grating 10 for tunnel support consisting of a reinforcing bar coupling portion 30a which is installed at intervals while connecting the pair of lower reinforcing bars 22 and the upper reinforcing bars 24,
The lower reinforcing bar 22 and the upper reinforcing bar 24 is formed of a deformed bar,
The reinforcing bar coupling portion 30a has a lower rebar mounting portion 31a in which an insertion portion 34a into which the lower rebar 22 is inserted is symmetrically formed inwardly at a position corresponding to the lower rebar 22 and the upper rebar 24. And an upper reinforcing rod mounting portion 32a in which an inserting portion 34a into which the upper reinforcing rod 24 is inserted is formed, respectively, between the lower reinforcing rod mounting portion 31a and the upper reinforcing rod mounting portion 32a. 32a is formed wider than the width of the outer surface (36a) is formed to be curved toward the inside and the mounting connection portion (33a) having a space portion 35a is integrally formed,
The rebar mounting portions 31a and 32a extend in the receiving space 310 to which the rebars 22 and 24 to be fitted through the insertion portion 34a are fixed, and the ends of the rebar mounting portions 31a and 32a. An extended part 320 having a curved surface 330 or an inclined surface formed therein so as to be easily inserted into the accommodation space 310, and an inner surface of the extension part 320 and an inner surface of the mounting connection part 33a positioned on the same line. Reinforcing grid support for tunnel support, characterized in that it is formed in the elastic portion 340 to support the reinforcing bars (22, 24) accommodated in the receiving space 310.
A pair of lower reinforcing bars 22 extending in parallel to form an arcuate curve, and a pair of upper reinforcing bars 24 installed in an arcuate manner at intervals above the lower reinforcing bars 22 and the lower reinforcing bars 22. In the reinforcing bar grating 10 for tunnel support consisting of a reinforcing bar coupling 30b which is installed at intervals while connecting the lower reinforcing bar 22 and the upper reinforcing bar 24,
The lower reinforcing bar 22 and the upper reinforcing bar 24 is formed of a deformed bar,
The reinforcing bar coupling portion 30b is a lower rebar mounting portion 31b in which an insertion portion 34b into which the reinforcing bars 22 and 24 are inserted is symmetrically formed in a position corresponding to the lower reinforcing bar 22 and the upper reinforcing bar 24. ) And the upper rebar mounting portion 32b are respectively formed, and the outer surface 36b is formed between the lower rebar mounting portion 31b and the upper rebar mounting portion 32b to be wider than the width of the rebar mounting portions 31b and 32b. It is formed to be curved toward the horizontal support piece (37b) and the mounting portion (33b) of the rectangular shape provided with a space portion 35b is integrally formed,
The rebar mounting parts 31b and 32b are formed at the receiving space 310 to which the rebars 22 and 24 to be fitted through the insertion part 34b are fixed, and at the ends of the rebar mounting parts 31b and 32b. An extended part 320 having a curved surface 330 or an inclined surface to be easily inserted into the accommodation space 310, and an inner surface of the extension part 320 and an inner surface of the mounting connection part 33b positioned on the same line. Reinforcing grid support for tunnel support, characterized in that it is formed in the elastic portion 340 to support the reinforcing bars (22, 24) accommodated in the receiving space 310.
The method according to any one of claims 1 to 3,
Between the lower reinforcing bar 22 and the upper reinforcing bar 24 is further provided with a reinforcing connector 40 at intervals,
The reinforcing connector 40 is formed with a depression 42 to be welded while receiving the reinforcing bar (22, 24) at a position corresponding to the reinforcing bar (22, 24), the elastic holding portion 44 between the lower Reinforcing grid grating support for tunnels, characterized in that is formed.
The method according to claim 4,
Reinforcing reinforcing bars (38, 38a, 38b) to be connected to the mounting connector (33, 33a, 33b) and the reinforcing connector (40) to be connected through the neighboring tunnel support reinforcement grid 10 and the joint reinforcement (50) 46. Reinforced grid support for tunnel support, characterized in that is formed symmetrically on the same line.
delete The method according to claim 2 or 3,
At one side of the inner surface of the rebar mounting parts 31a, 31b, 32a, and 32b, the tension unit 39 may adjust the tension of the rebar mounting parts 31a, 31b, 32a, and 32b when the rebars 22 and 24 are inserted or received. Reinforced grid support for tunnel support, characterized in that formed selectively.

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